JPH0753392B2 - Container and manufacturing method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to a container for storing foods and the like and a method for manufacturing the container.

(Prior Art) In general, a container main body for storing food or the like is fitted with a decorative label that displays the object to be stored and is printed so as to have the distinguishability.

As the label, a label obtained by applying a pressure-sensitive adhesive or an adhesive to a non-heat-shrinkable base material such as paper, synthetic paper or a plastic film, or a heat-shrinkable label using a heat-shrinkable film as a base material is used. There is.

(Problems to be solved by the invention) However, in the conventional non-heat-shrinkable label, when the mounted portion of the container body is a cylinder or a flat surface,
It can be mounted on the mounted portion without wrinkles and slack, but for example, when the mounted portion of the container has an uneven surface or a tapered shape, the entire surface of the label is the surface of the mounted portion. Cannot be completely adhered to.

Therefore, wrinkles and slacks occur in the middle and edges of the label,
There is a problem that a predetermined mounting mode cannot be obtained.

Although there is the heat shrinkable label as a label capable of solving the above problems, since these conventional labels are attached to the outer peripheral surface of the container body, the label may be peeled off inadvertently or may be dropped off. It was

Further, conventionally, a sheet-molded container having a gas barrier property equipped with a heat-shrinkable label has low rigidity, and therefore, during retort sterilization treatment or heating such as microwave cooking, due to the shrinkage force due to the reshrinkage of the heat-shrinkable label, There was a problem such as deformation of the container.

In view of the above problems, the present invention is a deformable container having an uneven surface or the like on its surface, and the decorative label can be attached to the container body without wrinkles and slack, and is attached to the container body. It is an object of the present invention to prevent the label from peeling off or falling off, and also to have rigidity so that the label does not easily deform.

(Means for Solving the Problems) The present invention has been made as a container and a method for manufacturing the same in order to solve the above problems, and the features of the container are that the inner container body 2 and the inner container body 2 are A container body 1 is composed of an outer container body 3 provided on the outer peripheral surface side, and a printed heat-shrinkable label 10 is interposed between the inner container body 2 and the outer container body 3. It is in.

Furthermore, the inner container body 2 is formed from a sheet body 9 having a gas barrier property, and the outer container body 3 is formed by injection molding a molten resin material.

A feature of the container manufacturing method is that a printed heat-shrinkable label 10 is mounted on the outer peripheral surface of the inner container body 2 by heat shrinking, and then the inner container body 2 is externally fitted to the male mold 12. Then, a predetermined space 15 is provided between the inner container body 2 side and the female mold 13.
The mold is closed in a closed state, and a molten resin material is injected into the predetermined space 15 to form the outer container body 3 integrally with the inner container body 2.

(Operation) In the above-mentioned container manufacturing method, when the decorative label 10 fitted on the inner container body 2 is heated, the decorative label 10 is heated.
Contracts along the outer peripheral surface of the inner container body 2 without tension and wrinkles.

Moreover, after the inner container body 2 is fitted onto the male mold 12 with the label 10 attached, the molten resin material is injected into the space 15 between the inner container body 2 side and the female mold 13 to form the outer container. Since the body 3 is formed, the label 10 is not displaced with respect to the inner container body 2, and a series of operations can be easily performed.

Since the decorative label 10 is provided between the inner container body 2 and the outer container body 3 in the container manufactured by the above method, the outer container body 3 protects the label 10 and the label 10
Prevents peeling and falling off.

Furthermore, the rigidity is improved by the outer container body 3, and the heat-shrinkable label 10 is heated in a fixed state by the molten resin injected into the space 15 between the inner container body 2 and the female mold 13, so that the shrinkability thereof is increased. Since the temperature decreases, the container body 1 is less likely to be thermally deformed.

(Example) Hereinafter, the Example of this invention is described.

In FIG. 1, reference numeral 1 denotes a container body having a bowl shape with a convex side surface. The container body 1 is composed of an inner container body 2 and an outer container body 3 provided on an outer surface of the inner container body 2. There is.

As shown in FIG. 2, the inner container body 2 includes an intermediate layer 6 having a gas barrier property made of a polyvinyl alcohol copolymer resin material and inner and outer layers made of a polypropylene material.
A three-layer sheet body 9 composed of 7 and 8 is formed by a known sheet forming means such as vacuum forming or compressed air forming.

The outer container body 3 is made of a transparent or translucent polypropylene resin material and is formed by injection molding so as to have a predetermined rigidity.

Reference numeral 10 denotes a tubular decorative label made of a heat-shrinkable polypropylene film, which is provided between the inner container body 2 and the outer container body 3 from the peripheral walls 2a and 3a to the bottom walls 2b and 3b. The container bodies 2 and 3 are heat-sealed without wrinkles and slack.

A predetermined print indication 11 is provided on the front surface or the back surface of the label 10 except for the heat-sealed portion with the inner container body 2 or the outer container body 3.

Next, a case of manufacturing the container 1 having the above structure will be described.

First, the sheet body 9 is formed on the inner container body 2 having a predetermined shape by a forming means such as vacuum forming or compressed air forming (see FIG. 2).

Next, after the tubular decorative label 10 as shown in FIG. 3 is externally fitted to the outer peripheral surface of the inner container body 2, the decorative label 10 is heated by hot air or the like to form the inner container body 2 The outer peripheral surface is closely attached and contracted without wrinkles and slack (see FIG. 4).

Next, the inner container body 2 integrally provided with the decorative label 10 as described above is fitted onto the male mold 12 of the injection molding apparatus 11 (see FIG. 5). At this time, since the decoration label 10 is integrally attached to the inner container body 2, the inner label body 2 is prevented from being displaced with respect to the inner container body 2,
It can be easily and quickly fitted on the outer surface.

After the inner container body 2 is externally fitted to the male mold 12, the male mold 12 and the female mold 13 of the apparatus 11 are brought close to each other to close the mold. In the state where the mold is closed in this way, the decorative label
Between the inner mold 10 and the inner container body 2 and the female mold 12, a predetermined gap 15
Is provided, and a polypropylene resin material in a molten state is injected into the gap 15 through an injection hole 16 formed in the female mold 13 to form the outer container body 3 integrally with the inner container body 2 ( (See FIG. 6). When the molten resin is injected into the gap 15, the decorative label 10 is positioned on the inner container body 2 and does not shift.

In the above-mentioned embodiment, the sheet body 9 is composed of the intermediate layer 6 made of the polyvinyl alcohol copolymer resin material and the inner and outer layers 7, 8 made of the polypropylene material. The material is not limited, and for example, an aluminum foil, a polyvinylidene chloride material, or the like can be used as the intermediate layer 6 having a gas barrier property.

Further, various resin materials such as polyethylene, polystyrene, polyester, and polyvinyl chloride can be adopted as the inner and outer layers 7 and 8, and the inner and outer layers 7 and 8 may be made of different materials.

In addition, the sheet body 9 is not limited to three layers, and may be provided in multiple layers such as four layers and five layers having a plurality of the above layers as appropriate, in which case the outermost layer constitutes the outer container body 3. A resin material having good heat fusion with the resin material is preferable. Furthermore,
The sheet body 9 may be composed of only one gas barrier layer.

Moreover, the resin material for injection molding for forming the outer container body 3 is not limited to the above-mentioned polypropylene, and for example, a material such as polyethylene, polystyrene, or polyvinyl chloride can be adopted.

The decorative label 10 is not limited to a heat-shrinkable polypropylene film, but may be a film having a heat-shrinkable property such as polystyrene, polyester, or polyvinyl chloride, and is formed of a foam film made of these materials. Thus, a heat insulating effect can be added.

Further, the label 10 may be a multi-layer film in which films made of the above materials are appropriately combined, and a film having excellent heat-sealing property is adopted for the inner container body 2 and the outer container body 3. preferable.

Further, when printing is performed on substantially the entire surface of the label 10, it is preferable to use an ink having thermal adhesiveness.

In addition, in the present invention, it is needless to say that the specific configuration of each part can be arbitrarily changed in design, and, for example, the shape of the container body 1 may also be tapered or polygonal.

(Effect of the invention) In the container of the present invention formed by the method as described above, since the label is attached between the inner container body and the outer container body that form the container body, the outer container body is You can protect the label and prevent it from coming off or falling off.

Further, since the decorative label has heat shrinkability, the label can be tightly attached to the inner container body and the outer container body by a heating operation, and the finished state of mounting can be improved.

In particular, because of the above-described configuration, it is possible to provide a label on the uneven surface portion of a deformable container having an uneven surface etc. without wrinkling and slack, and a cubic curved surface with excellent design It has come to have a great effect that the container can be provided.

Moreover, when the inner container body is made of a sheet body having a gas barrier property, and the outer container body is formed by injection molding, the container is excellent in gas barrier property, rigidity, heat resistance and dimensional accuracy. , Its practical value is enormous.

[Brief description of drawings]

FIG. 1 is a sectional view of a container according to the present invention, FIG. 2 is a sectional view of an inner container body, FIG. 3 is a perspective view of a label for decoration before being attached to the inner container body, and FIG. FIG. 5 is a cross-sectional view showing a state in which the label for use is attached to the inner container body by heat shrinkage. 5 and 6 are cross-sectional views showing the molding process of the container according to the present invention. 1 ... Container body, 2 ... Inner container body, 3 ... Outer container body, 9 ... Sheet body, 10 ... Decoration label, 12 ... Male type, 13 ... Female type, 15 ... Spacing .

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Claims (3)

[Claims] 1. A container body 1 is composed of an inner container body 2 and an outer container body 3 provided on the outer peripheral surface side of the inner container body 2, and between the inner container body 2 and the outer container body 3. A container characterized in that a heat-shrinkable label (10) printed on is attached to the container. 2. The inner container body 2 is formed from a sheet body 9 having a gas barrier property, and the outer container body 3 is formed by injection molding a molten resin material. Container. 3. A printed heat-shrinkable decorative label (10) is attached to the outer peripheral surface of the inner container body (2) by heat-shrinking, and then the inner container body (2) is fitted onto a male mold (12). The inner container main body 2 side and the female mold 13 are closed with a predetermined interval 15, and a molten resin material is injected into the predetermined interval 15 to integrate the outer container main body 3 with the inner container main body 2. A method for manufacturing a container, which is characterized in that: